Durak, Sevim, and Rauf Amirov. “INVERSE PROBLEMS FOR DISCONTINOUS COEFFICIENTS STURM-LIOUVILLE OPERATORS DEPENDING ON THE SPECTRAL PARAMETER BOUNDARY CONDITIONS”. Journal of Progressive Research in Mathematics 13, no. 1 (January 9, 2018): 2135-2150. Accessed May 5, 2024. http://scitecresearch.com/journals/index.php/jprm/article/view/1343.